The phone also provided evidence suggesting Abdi, who is of Tunisian heritage, was a pivotal figure in an online propaganda ring nicknamed “the Mumsnet for jihadi brides”, previously exposed by The Sunday Times.

Possible contact details in Syria for an 18-year-old IS bride from Lewisham, southeast London, were also discovered on the phone.

Abdi now faces prosecution in Germany for membership of a terrorist organisation, and the Times reports M15 is also keen to question her about her British links.

Some of the photos appear as innocent family snaps, with children playing in the park. Picture: Jenan Moussa/Al Aan TVSource:Supplied

IS HUSBANDS

Abdi previously lived a Western lifestyle, according to early photos on her phone, and first became involved in militant Islam in 2012 when she was already divorced and had a daughter, Firdaus, from her first marriage.

She followed her second husband, Nader Hadra from Frankfurt, to Raqqa in Syria with Firdaus and their two other children in January 2015.

Hadra was killed in fighting within six weeks of her arrival, and she was given a £1,000 widow’s cash payment.

She then remarried, this time to a German rapper called Denis Cuspert or Deso Dogg.

Cuspert was a key propagandist and recruiter of Europeans for IS who converted to Islam in 2010, taking the new name Abou Maleeq.